Does the V-Ray Collection work with Chaos Cloud? If a customer has the V-Ray Collection and some Chaos Cloud credits can they be used across the different products?

Yes, the V-Ray Collection works with Chaos Cloud and the products included in the Collection can use Chaos Cloud to add more rendering power. There are 20 Cloud credits included in the V-Ray Collection but more can be added if needed or you can use Cloud credits that you already own.